Refactoring Thumbnails : Separate Module Dependencies With Adapter

Separate Module Dependencies With Adapter

a server class directly implements an evolving client interface

use an Adapter to break the dependency upon the client related interface

Context:
Separate Module Dependencies With Adapter is an example of Introduce Indirection where the indirection is used to break the dependency between the server class an a client-bound interface, thus enabling the interface to evolve with the client, without requiring server implementation to be updated. Separating the server implementation from dependencies on client bound interfaces effectively decouples a server implementation from its context thereby promoting future reuse.